MAPLE CATERPILLARS. 407 
Mature larva.— Twig-like, head very deeply notched, each side above conical ; the 
face flat in front, the surface granulated. Prothoracic segment raised in front into a 
large granulated piliferous tubercle. Ou the fifth abdominal segment a pair of large 
lateral rough tubercles, a little paler than the body ; on the eighth segment a pair 
of converging pale granulated tubercles. Anal legs very large and broad, with a 
pair of long dorsal sharp fleshy tubercles ; supra-anal plate very large, conical and 
acute, with four setae near the apex. Body of even width throughout, reddish- 
brown, like a reddish willow twig, or sometimes greenish. The surface finely granu- 
lated with light and black, and with flat rough warts, paler in color than the rest 
of the body ; four on the front edge of each segment, and two dorsal ones behind. 
It varies in color from reddish-brown to green, thus mimicking willow trees of differ- 
ent colors. Length, 55 mm . 
Pupa. — Large, full, stout; dark brown. Cremaster large, stout, a projection on 
each side in the middle, beyond rounded, sharp, the point ending in a slender fork. 
Length, 24 mm . 
Moth. — A large stout-bodied moth, with heavily pectinated antennae and rather 
small wings. Fore- wings narrow, with the outer edge longer than usual ; pepper 
and salt or ash sprinkled with black brown ; an indistinct, diffuse, inner, curved 
line, with a second one nearer and diverging a little on the costa, being nearer 
together at the base. A third diffuse line incloses the discal spot. An outer distinct 
black hair-line always present. Hind wings with three dark lines. Abdomen with 
two rows of obscure black spots. Expanse of wings, 60 mm . 
41. Geometrid larva. 
This delicate caterpillar was observed both early and (ate in August, 
beginning to pupate August 30. 
Larva. -A very slender, long, smooth larva, with no humps or warts; the head 
nearly as wide as the body, smooth, slightly bilobed, rounded. Body smooth, cylin- 
drical, glaucous green, the hue of the under side of the red-maple leaf; with only ob- 
scure whitish subdorsa 1 lines. Lateral ridge thin, distinct, irregular. Length, 15 ram 
42. Hypena baltimoralis Guen. 
Order Lepidoptera ; family Pyralid^e. 
The larva of this species was common on the red maple at Bruns- 
wick, Me., early in August. The body is very slender, and at first 
sight it would be regarded as a geometrid. It is cylindrical, slender, 
tapering considerably toward the long anal legs, which are out- 
stretched. The segments are moderately convex, the sutures being 
very distinct. The head is rather small, smooth, somewhat bilobed. 
All the legs, both thoracic and abdominal, are of the same color as the 
body, which is pale pea- green, of the color of the upper side of the leaf 
of the red maple, but slightly paler. The sutures between the seg- 
ments are often straw-yellowish. The body sometimes has a slight 
purplish tint, the head remaining green. Length, 22 mm . 
August 5 one began to spin a cocoon, the pupa appearing the 7th. 
It is dark chestnut-brown in color. The moth issued August 17. 
